Patch to reinstate legacy wireless ioctls on linux 4.19

--- src_orig/archlinux-linux/net/wireless/wext-core.c   2018-12-07 15:55:27.385876108 +0100
+++ src/archlinux-linux/net/wireless/wext-core.c    2018-12-07 13:40:56.138049613 +0100
@@ -912,12 +912,13 @@
  * Main IOCTl dispatcher.
  * Check the type of IOCTL and call the appropriate wrapper...
  */
-static int wireless_process_ioctl(struct net *net, struct iwreq *iwr,
+static int wireless_process_ioctl(struct net *net, struct ifreq *ifr,
                  unsigned int cmd,
                  struct iw_request_info *info,
                  wext_ioctl_func standard,
                  wext_ioctl_func private)
 {
+   struct iwreq *iwr = (struct iwreq *) ifr;
    struct net_device *dev;
    iw_handler  handler;

@@ -925,7 +926,7 @@
     * The copy_to/from_user() of ifr is also dealt with in there */

    /* Make sure the device exist */
-   if ((dev = __dev_get_by_name(net, iwr->ifr_name)) == NULL)
+   if ((dev = __dev_get_by_name(net, ifr->ifr_name)) == NULL)
        return -ENODEV;

    /* A bunch of special cases, then the generic case...
@@ -954,6 +955,9 @@
        else if (private)
            return private(dev, iwr, cmd, info, handler);
    }
+   /* Old driver API : call driver ioctl handler */
+   if (dev->netdev_ops->ndo_do_ioctl)
+       return dev->netdev_ops->ndo_do_ioctl(dev, ifr, cmd);
    return -EOPNOTSUPP;
 }

@@ -971,7 +975,7 @@
 }

 /* entry point from dev ioctl */
-static int wext_ioctl_dispatch(struct net *net, struct iwreq *iwr,
+static int wext_ioctl_dispatch(struct net *net, struct ifreq *ifr,
                   unsigned int cmd, struct iw_request_info *info,
                   wext_ioctl_func standard,
                   wext_ioctl_func private)
@@ -981,9 +985,9 @@
    if (ret)
        return ret;

-   dev_load(net, iwr->ifr_name);
+   dev_load(net, ifr->ifr_name);
    rtnl_lock();
-   ret = wireless_process_ioctl(net, iwr, cmd, info, standard, private);
+   ret = wireless_process_ioctl(net, ifr, cmd, info, standard, private);
    rtnl_unlock();

    return ret;
@@ -1044,7 +1048,7 @@

    iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0;

-   ret = wext_ioctl_dispatch(net, &iwr, cmd, &info,
+   ret = wext_ioctl_dispatch(net, (struct ifreq *) &iwr, cmd, &info,
                  ioctl_standard_call,
                  ioctl_private_call);
    if (ret >= 0 &&
@@ -1106,7 +1110,7 @@
    info.cmd = cmd;
    info.flags = IW_REQUEST_FLAG_COMPAT;

-   ret = wext_ioctl_dispatch(net, &iwr, cmd, &info,
+   ret = wext_ioctl_dispatch(net, (struct ifreq *) &iwr, cmd, &info,
                  compat_standard_call,
                  compat_private_call);